Slip



d yJune 28, 1932. H, R, STANDLEE 1,864,953

SLIP

Filed D80. 50, 1929 Patented June 28, 1932 UNITED STATES PATENT oFFicE HARVEY R. STANDLEE, OF TULSA, OKLAHOMA, ASSIGNOR T THE CHZIFIBERSON'` COR- POBATION, 0F DALLAS, TEXASLA CORPORATION OF DELAWARE SLIP Application led December 30, 1929. Serial No. 417,303.

This invention relates to new and useful im rovements in slips.

(gne object of the invention is to provide improved slips adapted to be inserted in a support around well casing, pipe, tubing or the like for engaging and holding the same against downward displacement.

Another object of the invention is to provide slips so constructed and connected that they will automatically adjust themselves c ircumferentially about well tubingor the like when adapted thereto.

A further object of the invention is to pro vide slips so arranged and suspended from a handle that the lower ends of said slips will separate when lifted by said handle, thereby freeing the pipe or tubing to which the slips may be applied.

An important obJect of the invention is to provide slips capable of expanding and contracting concentrically of well tubing or the like, whereby said slips may be adapted to tubing of various diameters. Y

A construction designed to carry out the inventi on will be hereinafter described together with other features of the invention.

The invention will be more readily understood from a reading of the following speci- `fication and by reference to the accompany- 80 ing drawing in which an example of the invention is shown, and wherein:

Figure 1 is a side elevation of slips constructed in accordance with the invention, Figure 2 is an end elevation of the same, Figure 3 is a sectional plan viewl showing the slips mounted in a well casing head and applied to a section of tubing, and

Figure 4 is a reduced sectional elevation showing the slips as applied to a section of tubing. Y

In the drawing the numeral 10 designates an elongated slip of arcuate shape in cross section. This slip is jointly connected to a complementary slip 11, both of which are suspended from a U-shaped handle 12, as will hereinafter be explained. Both slips with their handle 12 thus form a group A. Two such groups may be inserted in a casing head B around well tubing C or the likel igure 3), for securing said tubing against downward displacement.

The slips 10 and ll each have a concave vertical face 13 and a convex back 14. A greater portion 141 of said back converges downwardly and inwardly to conform to an inclined seat 15 of the head B. When the slips rest in the seat 15 the face 13 of said slips is vertical and thereby parallel with the tubing C.

Teeth 13 are provided in the face 13 of each slip and transversely thereof. When the slips are adapted to the tubing, any downward movement of said tubing will cause the teeth 13 to bite therein. As the face 13 is parallel with the tubing the slips will evenly engage said tubing throughout their lengt i.

Each slip has a boss 16 protruding from its top. The boss is located on the side of the center of balance of the slip opposite its concave face 13, whereby the'lifting of the slips by their bosses willV cause the lower ends thereof to separate. The slips are loosely pivoted by their bosses to yoke ends 12 of "i the handle 12 by means of pins 17.

A recess 18 is provided in the back of each slip for lessening the weight thereof. Within this recess and through apertures 19` in the adjacent sides of the slips a studded bolt 19 is looselymounted for'connecting said slips. Said apertures 19` are large enough to provide for play of the bolt 19 therein. As this bolt is positioned above the center ofthe slips the lower ends are allowed to separate more than the Vupper ends.

Such construction and grouping of the slips provide for radial expansion and contraction of each group. This expansion and contraction will allow these groups A to be used on various sizes of tubing, pipe or casing with equal advantageous results.

As the slips are quadrantly shaped each group A will form a semi-circle. Two such groups will completely encircle the tubing C and thereby evenly distribute the weight of said tubing upon the casing head B when thetubing is suspended inthe well by the slips. Y In operation each of the groups A is lifted by its handles l2, which action causes the ich slips to separate as hereinbefore explainedu The groups are then placed in the seat 15 around the tubing C. Due to the inclination of the seat 15 the slips will automatically adjust themselves radially and circumferentially about the tubing. The tubing is then lowered causing the teeth 13 of the slips to bite into and engage said tubing, thereby holding the same against further downward displacement.

F r releasing the slips the tubing is raised thereby disengaging the teeth 13. As the groups A are lifted by their handles the slips of each group will separate, as hereinbefore explained, causing the groups to expand, thereby completely freeing the slips from the tubing.

it is to be understood that the slips may be used wherever found suitable and are not to be limited to well tubing` or a casing head, as such have been used only as an illustration of a useful application of the invention.

Various changes in the size and shape of the different parts, as well as modifications and alterations, may be made within the scope of the appended claims.

lhat l claim, is:

1. Slips comprising a pair of arcuate members having toothed faces, means for pivotally connecting the members solely above their centers and below their tops, and a handle free from said connecting means so attached to the tops of said members that the lower ends of said members spread when said slips are lifted by said handle.

2. Slips comprising a pair of arcuate members having toothed faces and inclined backs, means for pivotally connecting said members above their centers and below their tops, said pivotal connection being loose to allow for the inward vand circumferential displacement of said slips when placed in a seat, a handle pivotally attached to said members at their top outer portions, whereby the, slips when lifted by said handle will expand concentrica'lly with the lower portions thereof having the greater expansion.

3. S'lips'comprising a pair of arcuate members having concave toothed faces, means for loosely connecting the members above their centers and below their tops, a handle pivotally attached to the tops of said members outside their center of balance, whereby the lower ends of said members will spread when said slips are lifted by said handle, the members having a tapered back to conform to a tapered seat, whereby the members will adjust themselves inwardly and circumferentially when placed in said seat.

4. A pipe holding device including a pair of members each having a pipe engaging face, a. handle connected to the tops of said members between the outer edges of said device and the planes through the centers of gravity of said members, vand means free from connection with the handle for loosely connecting said members above their centers.

5. A pipe holding device including a pair of members each having a pipe engaging face, a handle connected to the tops of said members between the outer edges of said device and the planes through the centers of gravity of said members, and a connecting bolt having a loose lit in said members and free from connection with the handle so that said members will spread apart below said connecting bolt when lifted by said handle.

6. A pipe holding device including a pair of members each having a pipe engaging face, a handle connected to the tops of said members between the outer edges of said device and the planes through the centers of gravity of said members, and a loose connection between said members above mid-.height and free from connection with the handle so that said members are spread apart on a downwardly increasing flare when lifted by said handle, thus freeing their tooth-ed faces from an article gripped thereby.

v7. Slips comprising a pair of arcuate members having toothed faces, and a handle so connected tothe tops of said members with relation to their centers of gravity that said members will spread apart when they are lifted thereby.

8. A pair of slips having inner' pipe engaging faces and outer faces for engaging a bowl, a handle, means connecting the handle to said slips, and means connecting the confronting sides of said slips, said means being so related to each other that the slips spread at their lower ends when supported by said handle. l

ln testimony whereof I affix my signature,

HARVEY R. STANDLEE. 

